Draft-yoke for railway-car draft-rigging.



A. MITCHELL. DRAFT YOKE FOB. RAILWAY GAE DRAFT RIGGING. 4

APPLICATION FILED IBI B .17, 1913.

Patented Feb. 16, 1915.

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- INVENTOR M/////0/77/Z Mi /76 BY J ATTO NEY WlTNESSEs m7 ,9

UNITED STATES PATENTv OFFICE.

WILLIAM A. MITCHELL, OF SEDALIA, MISSOURI, ASSIGNOR TO WILLIAM H. MINER,OF

CHICAGO, ILLINOIS.

DRAFT-YOKE FOR RAILWAY-CAR DRAFT-EIGGING.

Specification of Letters Patent. Patented Feb. 16, 1915,

Application filed February 17, 1913. S'erial No. 748,794.

To all icizom it may concern:

Be it known that I, 'ILLIAM A. MITCHELL, acitizenof the United States,residing at Sedalia, in the county of Pettis and State of Missouri, haveinvented a certain new and useful Improvement in DrafteYokes forRailway-Car Draft-Rigging, of which the following is a full, clear.concise, and exact description, reference being had to the accompanyingdrawing, forming a part of this specification.

My invention relates to improvements in draft yokes for railway cardraft rigging, and more particularly yokes for railway passenger cardraft rigging.

The object of my invention is to provide a draft yoke of durableconstruction and eflicient operation. v

In the drawings forming a part of this specification Figure l is a sideelevation,

, partly in vertical longitudinal section on line l1 of Fig. 2 of adraft yoke embodying my invention. Fig. 2 is a plan View, partly inhorizontal longitudinal section on line 2-2 of Fig. 1. Fig. 3 is anenlarged detail perspective view of the front portion of the draft yoke.Fig. 4 is a perspective view of one of the bushings.

Referring to the drawings 5 represents the draft yoke, 6 the couplerextension bar,

and7 the connecting pin. The draft yoke comprises a strap like member 8of a general U-shape, having upper and lower limbs 9 and 10respectively, and a member 11 connecting said limbs at their rear ends.The

filler block 12 is preferably integral with the strap lik'e member 8,and with the member. 11 is I-shaped in longitudinal section, asillustrated at the numeral 12 in Fig. 2 of the drawings.

Rearwardly of the forward free ends 13,

a 13 of the strap like member 8, as indicated at the numerals 14, 14,the limbs 9 and 10 are turned inwardly toward each other, forming theoblique portions 15, 15, forwardly of which the said limbs are againdisposed in substantially parallel arrangement, and suitably spacedapart to form the slot 16, which is adapted to receive the couplerextension bar 6. The portions of the limbs of the yoke forming said slotare provided with vertical perforations 17, 17, each adapted to receivea bushing 18. The bushings 18 are each provided with an out ardlyextended flange 19, which serves to secure the bushing againstaccidental displacement. The pin 7 passes through the said bushings andthrough the perforation 20 in the butt 21 of the coupler extension 6.The

rear face 22 of the butt of the coupler-e'xtem joins together thelimbs'of the yoke at the 7 forward ends of the oblique portions 15, 15.The rearward plate 26 joins together the two limbs of the yoke at therearward ends of the oblique portions 15, 15, and at the.

points indicated by the numerals 14, 14. The connecting web 27 joinstogether the, oblique portions 15, 15 of the limbs as well as the plates25 and 26.

Between the brace 24,-at the front end and the filler block 12 at therear end of the yoke, and the two limbs 9 and 10 is provided the opening28, which is adapted to receive a draft gear and followers. The pin 7 isprovided at its upper end with a head 29, and at its lower end with thenut 30 threaded thereon, the same being secured against accidentaldisplacement by the cotter pin 31. 4

It will be apparent that through the construction of the forward end ofthe yoke hereinbefore described there is provided a vertically narrowslot 16 for the coupler extension bar to engage in, and thus acoinparatively short pin 7 is required. By reason of the short pingreatstrength of connection is assured. Through the engagebrace insuresagainst the tendency of the limbs to draw together in service, and'bindthe front follower disposed between them. In this construction pullingstresses to which the limbs back of the brace are subjected aretransferred in straight lines, a straight pull is given the forward endsof the yoke liinbsQand the pin 7 is subjected to a straight shearingmovement.

I am enabled by reason of the construction; described to easily removethe pin 7 from above, while the voke is in place in the draft rigging ofa railway car, through the employment of a short pin, and by reason-ofthe greater space provided between its head and the parts of the carabove the same.

a place the upper limb of the volre higher in relation to the car frame,thereby enabling Further, I am enabled to.

the placing of the oke above the truck frame, T his is of specialadvantage in cars of low draft. The effective strength of this oke intransferring the shocks transmitted r the coupler extension to the frontfollower and draft gear within the yoke directly through the I-shapedbrace will be readily understood.

A draft yoke comprising a pairof limbs a transverse slot between saidlini'bs at one end, a member near either end connecting said limbs, eachof said members being I-shaped in horizontal section.

WILLIAM A. MITCHELL.

Witnesses:

Gnonen A. JOHNSON, JOHN A. MARTINKUS.

